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A kind of degumming method of ramie

A degumming method and ramie technology, applied in the field of hemp textiles, can solve the problems of complex degradation mechanism, complex ramie gum components, and difficulty in achieving the desired effect by biological enzymes

Active Publication Date: 2017-12-29
INST OF BAST FIBER CROPS CHINESE ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the above-mentioned patent discloses the method of using various biological enzymes for degumming, the biological enzymes used in the above-mentioned patents are mostly pectinase, supplemented by adding a small amount of xylanase or mannanase, but due to the ramie gum component complex, and the degradation mechanism is relatively complicated, it is difficult for the above-mentioned biological enzymes to achieve the desired effect

Method used

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Examples

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Effect test

Embodiment 1

[0034] The preparation of embodiment 1 biological enzyme

[0035] Use the bacterial strain Dickeya dadantii CGMCC 5522 to inoculate the improved broth culture solution for 5h activation, so that the dormant strains become activated bacterial suspensions, take 1.0ml bacterial suspensions and dilute 10 5 After doubling, spread evenly on the selected culture plate and cultivate for 22 hours to obtain typical colonies. Take 1 typical colony and place it in a test tube with improved broth culture solution for dispersion, then pour it into a conical flask filled with 300ml of improved broth culture solution. medium, 35°C, 160rpm, cultured for 6h; transferred to the fermentation medium, 34-36°C, 200r / min, micro-aeration (0.4MPa compressed air flow rate 0.3m 3 / m 3 h) Culture for 6 h.

Embodiment 2

[0037]Composite biological enzyme fermentation broth, the total enzyme activity of the fermentation broth is 20000U / ml, wherein 87% is the biological enzyme prepared in Example 1, 5% is commercially available polygalacturonase, and 5% is xylanase , 1% cellulase, 2% glucosidase;

[0038] Raw hemp is made of ramie produced in Yuanjiang, Hunan, microwave dried to a water content of about 5%, rubbed and pressed, and tied into hemp handles of 600-700 g / handle;

[0039] For the first degumming, put the crushed ramie in a cage and soak in enzyme, control the weight ratio of degumming enzyme solution to hemp handle to 5:1, soak for 20 minutes, dilute, control the bath ratio to 10:1, keep warm at 40°C for degumming, and repeat The dosage of the enzyme is 1000U / g, the degumming time is 2 hours, ventilate, or swing the handle;

[0040] For the second degumming, add 500U / g compound enzyme, the liquor ratio is 12:1, the degumming temperature is 40°C, and continue degumming for 2 hours;

...

Embodiment 3

[0043] Compound biological enzyme fermentation broth, the total enzyme activity of the fermentation broth is 20000U / ml, wherein 87.5% is the biological enzyme prepared in Example 1, 4.5% is commercially available polygalacturonase, and 4.5% is xylanase , 1% cellulase, 2.5% glucosidase;

[0044] Raw hemp is made of ramie produced in Yuanjiang, Hunan Province, microwave-dried to a water content of about 4%, rubbed and pressed, and tied into hemp handles of 600-700 g / handle;

[0045] For the first degumming, put the crushed ramie in a cage and soak the enzyme, control the weight ratio of the degumming enzyme solution to the hemp handle to 6:1, soak for 25 minutes, dilute and control the bath ratio to 10:1, keep warm at 40°C for degumming, and repeat The dosage of the enzyme is 900U / g, the degumming time is 2 hours, ventilate, and swing the handle;

[0046] For the second degumming, add 500U / g compound enzyme, the liquor ratio is 12:1, the degumming temperature is 40°C, and conti...

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Abstract

The invention discloses a ramie degumming method. The ramie degumming method includes a), drying and pressing a ramie raw material and b), degumming the pressed ramie by a compound biological enzyme. The compound biological enzyme is formed by mixing a first component with a second component according to the ratio of (70-90): (10-30). The first component is a biological enzyme obtained from fermentation of strains with the preservation number of CGMCC5522. The second component is one or more of polygalacturonase, xylanase, cellulase and glycosidase. Compared with the prior art, the ramie degumming method has the advantages that high degumming rate is achieved and fiber property is enhanced and improved remarkably.

Description

technical field [0001] The invention relates to the hemp textile industry, in particular to a method for degumming ramie. Background technique [0002] Ramie is known as "Chinese grass" internationally. It is an important worsted fiber crop second only to cotton, and it is also a unique traditional characteristic crop and an important preventive raw material in China. Ramie fiber has excellent properties such as breathability, antibacterial, anti-mildew, anti-ultraviolet, and non-static, and is a better natural fiber for textiles. But scraped ramie raw hemp contains about 30% colloidal substances composed of pectin, hemicellulose, lignin, etc., which makes the fibers bonded and stiff, and cannot be used for high-grade textile fabrics, and must be degummed and removed. [0003] In the prior art, various degumming methods have been disclosed. For example, the traditional degumming method is high-temperature caustic soda scouring, which requires a lot of water for washing, wh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01C1/04D01C1/02
CPCD01C1/02D01C1/04
Inventor 张运雄刘正初
Owner INST OF BAST FIBER CROPS CHINESE ACADEMY OF AGRI SCI
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